<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>继承</title>
</head>
<body>

</body>
<script>
    //定义Person类
    class Person{
        //
        constructor(name,age) {
            this.name = name;
            this.age = age;
        }
        //eat方法
        eat () {
            document.write("吃饭.....");
        }
    }
    //定义Worker类继承Person
    class Worker extends Person{
        constructor (name,age,salary) {
            super (name,age);
            this.salary = salary;
        }

        show () {
            document.write(this.name+","+this.age+","+this.salary+"<br>");
        }
    }
    //使用Worker
    let w = new Worker("张三",23,10000);
    w.show();
    w.eat();
</script>
</html>